Vibrating mechanism



lJuly 17, 1928. 1,677,759.

A. A. FREvER-r VIBRATING IEGHANISI Filed Aug. 23, 1925 Patented llilly 17, 1928.A

- entre!) STATESl `PATENT OFFICE. y

ALBERT A. Fnnvsnfr, on ALMA, MICHIGAN, AssIGNon'ro CRIPPEN MANUFACTURING COMPANY, oF ALMA, MICHIGAN, ACCRPCRATICN oF MICHIGAN.

VIBRATIN G MECHANISM.

Appncaaonfvied August 23, 192e.; seran No. 131,029.

y This invention relates tovibratory mechanism and the like, and especially to a mechanism for vibrating a resiliently mounted shoe in which screens are secured forscreeu ing` beans and seeds of various kinds.

The prime object of the invention is to design vibrating mechanism whiclrwill remain in neutral non-vibrating position until the speed of the pulley or driven member has reacheda 'certainY l. l); M., and which will then automatically and sharply shift to vibratery position whereit is held by centrifugal force.

Another object isto provide a vibi'atoryV meihanism of simpl and substantial. design, vhichV is adjustable as to length of vibration, and also adjustable as to the speed at which the/vibrator will shift to vibrating position.

A further object shifting `of the counterbalanced connterweight into vibrating position until the speed of the machine has reached a Certain ll. l). M., acting in a like manner toV sharply` l vertical sectional view through pulley and eountcrbalaneed counterln vibrating mechanism 'in general., and particularly vibrating mechanism based on the counterbalanced idea, the counterweight chucks back and forth into and out of vibrating position as soon as the machine is started, and continues to do s o until the machine has attained suhcicnt speed rso that the Centrifugal force will hold it in vibrating position. l

The vibrations produced between the time of starting, and the time the machine or is to design a vibrator, and provide resilient means foropposing thel parts pulley is rotating at proper speed lare un# desirable, producing a very poor screening cllcct, and this undesirable feature I have overcome by designing a vibrating mechanism which does not operate until a Certain predetermined speed has been attained, and which acts ina lilre'manner when the power` is cut oli'. f I Y Referringk now particularly, to the drawing in whih'I have shown the preferred embodimcntof my invention, the numeral 5 indicates a cylindrical pulley which is-pro-l -Vided with a hub 6, and a rim 7, Vone side being closed by a web 8, which can be suitcorcd as shown at 8, or thepulley can be cast with spokesV (not shown) in tlieusual manner, the hub being bored as shown at 9 toreceive the shaft `on which the pulley l is mounted. l

The vibrating mechanism comprises a counterbalanced Counterweight 10 formed with a centrally disposed opening 11' embracing the hub ofthe pulley, the end 12 being enlarged, the outer rim or Vedge being turned to approximately the same diameter the innerv rim ofthe pulley, a leg 13 being cast integral with the counterweight, and 'is provided with an,l opening in the outer end thereof for reception of a bolt 14,' and by' means of which it is pivotally secured to the pulley. i

The oppositeside of this counterweight is bored as shown at 15 and a compression CSL spring 16v is mounted therein, 'one end engaging the hub of the pulley. This spring opposes the shifting y of said Counterweight until the speed has reached a certain R. P.

iM. as will be presently described."

' The 'adjusting means for adjusting the throw or vibration comprises 'a threaded opening 17 provided in the enlarged end of the counter-weight, and an adjusting bolt 1S is threadedthcrcin, the one end engaging the? inner surface of the pulley rim when the mechanism is in vibrating position and limits the outward movement of the counter-- weight, and it will be obvious that the length of throw or vibration can be easily regulated by manipulation of the bolt.

The adjusting means to determine the R. P. M. at which the counterbalanced Counterweight shall shift to vibrating positherein, a lock nut 21 being provided on the bolt as shown for locking it in position, the head 20l of said bolt contacting with the rim of the pulley when the mechanism is in nonvibrating position, and serves to hold the counterweight slightly off center and against the pressure of the spring, and adjustment thereof serves (when the machine is operating) to regulate the speed at which the counteiweight will shift to vibrating position, consequently, it will be clear that the device can be so regulated that there will be no vibration of the shoe which supports the screens, until the proper predetermined pulley-velocity is attained, and the screening action will'be at the highest point of eflil ciency at all times.

In practise the counterweight is set slightly off center, the length of throw or vibration being regulated by the adjusting bolt 18, power is applied to the machine, the vi brating mechanism remaining in non-vibrat ing position until a certain speed is attained, the distance which the counterweight is olf center being compensated for by the weight of the shoe or other mechanism which is being vibrated, until overcome by centrifugal force, when the mechanism automatically shifts to vibrating position.

From the foregoing description it will be obvious that I have perfected a very simple, economical and effective adjustable vibrating mechanism for screening devices and the like.

Whatv I claim is l. A vibrating mechanism comprising a' cylindrical member having a hub. a counterbalanced counterweight pivotally secured thereto and having a centrally disposed opening embracing said hub, resilient means interposed between the counterweight and liub and adjustable means for adjusting the offcenter movement of the counterweight.

2. A vibrating mechanism comprising a cylindrical member provided with a hub, of a counterbalanced counterweight pivotally secured thereto and having a centrally disposed opening embracing said hub, resilient means mounted in the counterweight and engaging said hub, and means for adjusting the position of the counterweight with rela-- tion thereto.

8. A vibrating mechanism comprising a driven cylindrical member provided with a hub, of a countei'balanced counterweiglit pivotally secured thereto and having a centhe It. P. M. at which said mechanism will move to vibrating position, and adjustable means for regulating the length of throw or vibration. j

5. A vibrating mechanism comprising a driven member provided with a hub, a counterbalanced counterweight pivotally'secured thereto and formed with a centrally dis` posed opening embracing the hub, adjustable moans for adjusting the throw or vibration of said counterweight, and adjustable means for adjustingthe offcenter non-vibrating pol` sition thereof, and a spring mounted in the counterweight and engaging the hub for opposing the shifting vof said counterweight until a certain predetermined speed has beenV reached.

6. A vibrating mechanism comprising a driven member, a counterbalanced counterweight secured thereto, adjustable means for adjusting the throw of said counterweight, adjustable ineansifor adjusting the oifcenter non-vibrating position thereon and resilient means mounted in said counterweight and engaging said driven member.

7. A vibrating mechanism comprising a driven member, a counterbalanced counter weight secured thereto, adjustable means for adjusting the throw of said counterweight,

adjustable means for adjusting the non-vibrating position thereof, and resilient means interposed between the driven member and the counter-weight for opposing the shifting of said counterweight until the driven member has reached a certain speed.A

In testimony whereof I aiiix my signature.

ALBERT A. rnnviin'r.

predetermined 

